I took medication twice (Prozac from 2009 - 2011 and from March 2012 - present day). The first time, it was perfect - I had no panic attacks, no nausea, nothing. But now I started to get panic over and over again, to the point where I can't do anything but sleep when it hits me. I almost feel like a zombie, it's horrible, I get nauseous then so tense that I can't do anything.